| Authors: | Guo, X. F.; Meyung, T.; Yun, Y. H.; Shanov, V. N.; Halsall, H. B.; Heineman, W. R. |
| Title: | Micro Solid-Contact Ion-Selective Electrode Using a Carbon Nanotube Tower as Ion-to-Electron Transducer and Conductive Substrate |
| Type: | Journal Article |
| Publisher: | Electroanalysis |
| Year: | 2012 |
| Volume: | 24 |
| Issue: | 11 |
| Start Page: | 2045 |
| End Page: | 2048 |
| DOI: | 10.1002/elan.201200348 |
| Abstract: | Solid contact (SC) ion-selective electrodes (ISEs) have been recognized as the next generation of ISEs. In this work, the electrical conductivity and mechanical strength of a carbon nanotube (CNT) tower enable it to play the dual roles of transducer and substrate for micro SC-ISEs. The electrode had a close to Nernstian slope of 35 mV/decade a(Ca2+), a linear range of four orders of magnitude of calcium ion activity (10(-5.6) to 10(-1.8) M), and a detection limit of 1.6x10(-6) M. The simplified fabrication by a one-step drop casting makes miniaturizing SC-ISEs and fabricating sensor arrays easier to achieve. |
| Keywords: | solid contact, ion-selective electrode, carbon nanotube tower, array, microelectrode, ordered macroporous carbon, optical sensors, bulk optodes, membrane, polymer |
